A database is any organized collection of data organized to provide efficient retrieval.
0
votes
1answer
16 views
PHP script to connect to MySQL database using PDO
Introduction
I am preparing to use a basic script to cover how you can connect to a MySQL database using PDO. This script is meant for educational purposes (introductory class on PHP/MySQL) and does ...
2
votes
3answers
106 views
Music collection with lyric songs and instrumental pieces
I have problems with dealing with derived classes that inherit from the same base class.
I have 2 types of songs:
Songs with lyrics that have: Title, Tags (sad, happy etc.), lyrics (one line), ...
0
votes
0answers
8 views
Implementing versioning system with MySQL [migrated]
I know this has been asked here and here, but I have the same idea with a different possible implementation and I need some help.
Initially I had my blogstories ...
3
votes
3answers
57 views
Grabbing hashed password from a database
I have just discovered the beauty of prepared statements in PHP and how they protect against SQL injection. In my first time using them, I am attempting to grab a hashed password from a database and ...
3
votes
0answers
28 views
Combining pagination and non query grouping in Slick 3.0
I have the following tables:
val postTable = TableQuery[Posts]
val postTagTable = TableQuery[PostTags]
val tagTable = TableQuery[Tags]
One post can have multiple ...
10
votes
5answers
1k views
Marijuana information program
I made a simple marijuana information program in which I give the user a list of strains and give the user information about it, like: effects, medical, negatives, and its cannabis type ...
4
votes
2answers
35 views
Multiple DB record creation after a successful operation
I am working on a payment process. Upon a successful payment process, I have to create multiple records. For that, I have made this class:
...
3
votes
1answer
61 views
Versioning documents in Couchbase
I've just converted a class for versioning Couchbase documents from Java to C#, but I'm not 100% familiar with the Couchbase API so would like some feedback.
The original class can be found here.
...
3
votes
1answer
28 views
Updating multiple membership plan expiration dates at once
I have model action in RequestAdmin like this:
...
3
votes
0answers
28 views
C++ PostgreSQL database driver wrapper
I am writing my own wrapper for PostgreSQL (but it can be used for other engines too).
I am using this desgin:
...
3
votes
1answer
62 views
Forms - Ordered fields vs. dynamic iterations
I've made about 2 forms that have a server side action using PHP. For the first one, I made a variable for every form field and mapped it to $_POST["name"]. For ...
2
votes
1answer
47 views
Framework for comparing database objects
This code allows me to compare two complex objects, which are stored in a relational database, to see what has been removed from the objects. These objects have a unique integer primary key. They ...
4
votes
1answer
58 views
Database classes for job offers
I've recently started using PHP OOP, and I'm now working on an application where different company representatives can create job offers that candidates can look at.
I have a variety of objects for ...
6
votes
5answers
586 views
Creating Original Database Algorithm--Login System
For fun, I have been making a very basic login system in Python. I was going to look up an algorithm or something for user info storage and transfer, but then decided it would be more fun to come up ...
2
votes
0answers
30 views
Phoenix Ecto schema for internal mailbox
I am building an application messaging system. I am planning on using channels for real-time notifications but I was wondering if this schema makes sense. I am looking for any constructive criticism ...
1
vote
2answers
74 views
Multi-User Roles in Laravel
I am very new to Laravel. I am building a website where multiple users can have one or more roles. I have a users table and a user_roles table. Each ...
3
votes
1answer
61 views
0
votes
1answer
60 views
Synchronizing two SQL Server database tables with the most recent changes to both tables
I'm very new to SQL, but I'm coding a C# program that interacts with a database. There's a master database on my computer, and there's a client database on my tablet.
When I re-connect my tablet to ...
5
votes
4answers
520 views
Database adapters
I'm writing adapters for some MS Access database because I really didn't like that automatically generated code that Visual Studio was providing. Right now I just need to get data, not updating ...
5
votes
2answers
291 views
Slim API with 3 layer architecture
I'm new to Slim and the three layered approach I'm using below. So far I have the API, a Presentation layer (leaving out for now), a Business Logic Layer, and a Data Access Layer. The code's working, ...
4
votes
1answer
173 views
Key value flat file system - single header INI replacement
I'm very happy with the performance, but I always try to optimize my code as much as possible. Since I plan on using the code in production, I feel more save posting it here first. I probably missed ...
5
votes
4answers
451 views
Educational website using ASP.NET webforms
Our team is developing an educational website using ASP.NET webforms. We designed DAL & BAL classes and now I have some questions:
Are DAL & BAL designed well?
Would it be better using ORM ...
4
votes
2answers
125 views
C# Method to determine database status
I have a task that I am trying to complete and would appreciate direction, to know which is the most efficient path to take for future requirements.
Use Case: A background process that determines if ...
4
votes
1answer
61 views
Pickling cars with simple management system in Python
This is my first Python program (before that I've been just poking around with the interpreter itself). I took this opportunity to do some user input and play around with ...
6
votes
1answer
188 views
2
votes
1answer
91 views
Throwing exceptions in a database wrapper
I hope the extension methods ThrowArgumentNullExceptionIfNullOrEmpty and ThrowNullReferenceExceptionIfNullOrEmpty are ...
4
votes
2answers
199 views
Library Management System
I have created a Library Management system. Can anyone please look at if see if there's any bad practices or if anything could be done better?
Main.cpp
...
2
votes
1answer
48 views
Database module for node.js
This will get quite clumsy if I continue down the road with this design, so I'm asking you, enlightened ones, is there a way to make this prettier and easier to understand? Primarily the ...
1
vote
0answers
37 views
Natural join row comparison
The intent of the function is to simply tell me whether or not two vectors contain the same values that have the same column names. At this point of my algorithm I'm just checking the whether or not I ...
2
votes
2answers
85 views
Query using cross join or inner join
Please consider the following three tables that I am playing with in the image below:
I want to come up with a SQL Query which shows first_name, last_name, and the total amount of all orders for ...
3
votes
1answer
138 views
CRUD (database layer) for F# with TypeProviders
I am a newbie in F# and I am thinking about use F# in my next project. The project will work the database and I need to store and retrieve instances of objects in the Db.
Could you please check my ...
2
votes
1answer
95 views
Performance shifting for SQL Database and Linq memory grouping
I am messing around with shifting between stored procedures and business layer EF getting data rapidly then processing in memory.
This works and on a static data range of 3 months I get execution ...
1
vote
0answers
12 views
1
vote
0answers
69 views
Create and access database connection
I'm working on an MVC project and I'm writing the code for get access to the database connection.
I have two files:
The first (PdodbLib.class.php) extends PDO:
...
2
votes
1answer
79 views
Checking for duplicate values in database with Python
I'm working on a Python application where I read and extract data from an HTML file. The data is stored in a list, and the number of items in a list is, on average, 50,000+.
The items from the list ...
0
votes
1answer
96 views
Queue like system to check existence of email
I have a table in my database containing email and email_state amongst other values.
Email is the email of the contact, and ...
-2
votes
1answer
83 views
Reducing database access time and connection count [closed]
I have 2 connections. How can I reduce this to one connection?
...
4
votes
1answer
151 views
Lazy Load for multiple entities at a time
We have a system with a non standard database solution. All trips to the DB are rather expensive. We cannot use entity framework.
Currently our lazy loading is on an entity by entity basis. So if I ...
15
votes
1answer
243 views
Modeling a Mage character from nWoD, using Django
Goal
Design a representation of a mage character from the World of Darkness RPG, as well their associated spells.
Here is a visual representation of the schema. You can see it more closely ...
5
votes
2answers
439 views
Create SQLite backups
I have this script for creating SQLite backups, and I was wondering whether you'd have any suggestions on how to improve this. I was thinking that maybe it should create the backup ...
3
votes
0answers
100 views
Rails models for Users, Offers, Comments, Documents, and Reviews
I want to simplify my Rails models, current looks like this:
...
2
votes
0answers
29 views
Auto-expire key/value database (with different key types) in Haskell using acid-state
I am making a key-value database using acid-state. It has three similar "pools", one for cookie records, one for email verification of new accounts, and the last for resetting passwords.
There are ...
3
votes
1answer
592 views
Optimizing for data import in Neo4j using py2neo
Here is my code for importing from a .csv to a neo4j graph using py2neo and cypher statements. I've noticed that it slows down significantly the bigger the graph gets. It takes several seconds just to ...
2
votes
1answer
45 views
Creating keyword records in a database
This code is part of a data model used to create keyword records in a database.
...
2
votes
0answers
81 views
How common is the use of closure in Lisp?
I'm writing a little tool for mangling MP3 collections and, as a challenge, I decided to write in in Hy, a dialect of Python that uses Lisp syntax. Like every good developer, I wrote out my list of ...
1
vote
0answers
20 views
Bitcoin, detecting deposits to the node.js server
I'm trying to detect deposits that user will made. I explained it with comment lines in below.
Can you say are there any flaw in it?
...
7
votes
1answer
89 views
Summing the prices from Transaction files
I need to cut down the run time of this query. Currently it's taking 45 minutes. Is there something I can change in the table or the query to allow this to run faster?
...
1
vote
0answers
59 views
3
votes
3answers
118 views
Cancelling an order with a side-effect of logging the operation
I have a data access layer method to cancel an order. This operation should have an associated "operation history" entry.
My first (naïve) implementation looks like this:
...
5
votes
1answer
70 views
TrackDAO: what can be improved?
In this specific situation there is a table with trackdata and a form to add rows. For the sake of clarity I won't include the view-related code here. The added rows are added to a LinkedList when ...
